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Product definition of piston type steam pressure reducing valve

  Application and main performance: This valve is suitable for water, steam and air medium pipeline. The inlet pressure can be reduced to a certain required outlet pressure by adjusting. When the inlet pressure and flow rate change, the outlet pressure can be automatically kept within a certain range by the energy of the medium itself, but the difference between the inlet pressure and the outlet pressure must be ≥ 0.2mpa/cm

  Working principle and structure: when the pressure reducing valve leaves the factory, the regulating spring is in the uncompressed state, at this time, the main valve disc and the auxiliary valve disc are closed. When using, turn the adjusting screw clockwise to compress the adjusting spring to move the membrane flap to open the auxiliary valve disc. The medium enters the piston from hole a through the secondary valve seat to the B hole, and the piston moves downward to push the main valve disc away from the main valve seat under the action of medium pressure, At the same time, when the pressure behind the valve exceeds the set pressure, the diaphragm is pushed up to compress the regulating spring, and the auxiliary valve disc moves to the closing direction, so that the medium flowing above the piston is reduced, and the pressure is also decreased. At this time, the main valve disc moves up and down under the force of the main disc spring, which reduces the gap between the main disc and the main valve seat, On the contrary, when the pressure behind the valve is lower than the set pressure, the gap between the main valve disc and the main valve seat increases, and the medium flow also increases, so that the pressure behind the valve increases to a new balance

Installation and maintenance of piston type steam pressure reducing valve

  The installation and maintenance of steam pressure reducing valve should pay attention to the following matters:Handwheel, handle and transmission mechanism are not allowed to be used for lifting, and collision is strictly prohibited. The double gate valve should be installed vertically (i.e. the stem is in the vertical position and the hand wheel is at the top). The gate valve with bypass valve should be opened before opening (to balance the pressure difference between inlet and outlet and reduce the opening force).The gate valve with transmission mechanism shall be installed according to the provisions of the product operation manual.

  If the valve is used frequently, lubricate it at least once a month. This kind of valve should be installed horizontally in the pipeline.